My Lords, earlier this year the World Health Organization Science Panel reclassified diesel exhaust as a carcinogen, underlining that many cases of lung cancer could be connected to the contaminant and that exhaust could become as important a public health hazard as passive smoking. The European Public Health Alliance has pointed to the urgent need to develop research into the possible impact on other health conditions such as diabetes and dementia. Can the Minister tell the House what action is being taken in response to the WHO declaration and what research funding and programmes are in place to address the growing concerns on this issue?